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B. Kromoser, J. Kollegger:
"Construction of a thin walled concrete shell event canopy";
Talk: The 12th Central European Congress on Concrete Engineering, Tokaj; 2017-08-31 - 2017-09-01; in: "Innovative materials and technologies for concrete structures", G. Balazs, K. Koris, K. Kopecsko (ed.); (2017), ISBN: 978-963-12-9651-8; 435 - 442.

Shells are efficient structures, which enable a very high utilization of the construction material
concrete. Unfortunately, most formwork technologies required for the construction of
concrete shells are labor and material intensive. A very resource efficient alternative
construction method invented at TU Wien is called "Pneumatic Forming of Hardened
Concrete (PFHC)" as described in Kromoser and Kollegger (2014, 2015). A flat concrete
plate is transformed into a double curved shell by inflating an air cushion placed under the
concrete plate and by tensioning additional post-tensioning tendons mounted at the
circumference. Currently the construction method is first practically applied for the
construction of an event canopy with the plan measurements of 26.5 x 19.1 m and a height of
4.2 m. The present contribution describes the functionality of the construction method, the
design process and the construction process of the structure.

http://publik.tuwien.ac.at/files/publik_262602.pdf